Question

va rog sa ma ajutati pt aflarea numerelor din a+b+c,stiind ca a+b=3820,a+c=2950 iarb+c=1230

Answer 1

$\left \{ {{a+b=3820} \atop {a+c=2950}} \right. \\ \left \{ {{b-c= 870} \atop {b+c=1230 }} \right.$
$\left \{ {{2b=2100} \atop {c=1230-b \\ }} \right. \left \{ {{b=1050} \atop {c=180}} \right. \\ a=3820-1050=2770$